Replace InstanceCounter with CountedObject

modules/ripple_basics/utility/ripple_CountedObject.cpp

@@ -0,0 +1,78 @@
+//------------------------------------------------------------------------------
+/*
+    Copyright (c) 2011-2013, OpenCoin, Inc.
+*/
+//==============================================================================
+
+CountedObjects& CountedObjects::getInstance ()
+{
+    static CountedObjects instance;
+
+    return instance;
+}
+
+CountedObjects::CountedObjects ()
+{
+}
+
+CountedObjects::~CountedObjects ()
+{
+}
+
+CountedObjects::List CountedObjects::getCounts (int minimumThreshold) const
+{
+    List counts;
+
+    // When other operations are concurrent, the count
+    // might be temporarily less than the actual count.
+    int const count = m_count.get ();
+
+    counts.reserve (count);
+
+    CounterBase* counter = m_head.get ();
+
+    while (counter != nullptr)
+    {
+        if (counter->getCount () >= minimumThreshold)
+        {
+            Entry entry;
+
+            entry.first = counter->getName ();
+            entry.second = counter->getCount ();
+
+            counts.push_back (entry);
+        }
+
+        counter = counter->getNext ();
+    }
+
+    return counts;
+}
+
+//------------------------------------------------------------------------------
+
+CountedObjects::CounterBase::CounterBase ()
+{
+    // Insert ourselves at the front of the lock-free linked list
+
+    CountedObjects& instance = CountedObjects::getInstance ();
+    CounterBase* head;
+
+    do
+    {
+        head = instance.m_head.get ();
+        m_next = head;
+    }
+    while (! instance.m_head.compareAndSetBool (this, head));
+
+    ++instance.m_count;
+}
+
+CountedObjects::CounterBase::~CounterBase ()
+{
+    // VFALCO NOTE If the counters are destroyed before the singleton,
+    //             undefined behavior will result if the singleton's member
+    //             functions are called.
+}
+
+//------------------------------------------------------------------------------